1 /* 2 * dvb_net.c 3 * 4 * Copyright (C) 2001 Convergence integrated media GmbH 5 * Ralph Metzler <ralph@convergence.de> 6 * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de> 7 * 8 * ULE Decapsulation code: 9 * Copyright (C) 2003, 2004 gcs - Global Communication & Services GmbH. 10 * and Department of Scientific Computing 11 * Paris Lodron University of Salzburg. 12 * Hilmar Linder <hlinder@cosy.sbg.ac.at> 13 * and Wolfram Stering <wstering@cosy.sbg.ac.at> 14 * 15 * ULE Decaps according to RFC 4326. 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License 19 * as published by the Free Software Foundation; either version 2 20 * of the License, or (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, write to the Free Software 29 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 30 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html 31 */ 32 33 /* 34 * ULE ChangeLog: 35 * Feb 2004: hl/ws v1: Implementing draft-fair-ipdvb-ule-01.txt 36 * 37 * Dec 2004: hl/ws v2: Implementing draft-ietf-ipdvb-ule-03.txt: 38 * ULE Extension header handling. 39 * Bugreports by Moritz Vieth and Hanno Tersteegen, 40 * Fraunhofer Institute for Open Communication Systems 41 * Competence Center for Advanced Satellite Communications. 42 * Bugfixes and robustness improvements. 43 * Filtering on dest MAC addresses, if present (D-Bit = 0) 44 * ULE_DEBUG compile-time option. 45 * Apr 2006: cp v3: Bugfixes and compliency with RFC 4326 (ULE) by 46 * Christian Praehauser <cpraehaus@cosy.sbg.ac.at>, 47 * Paris Lodron University of Salzburg. 48 */ 49 50 /* 51 * FIXME / TODO (dvb_net.c): 52 * 53 * Unloading does not work for 2.6.9 kernels: a refcount doesn't go to zero. 54 * 55 */ 56 57 #include <linux/module.h> 58 #include <linux/kernel.h> 59 #include <linux/netdevice.h> 60 #include <linux/etherdevice.h> 61 #include <linux/dvb/net.h> 62 #include <linux/uio.h> 63 #include <asm/uaccess.h> 64 #include <linux/crc32.h> 65 #include <linux/mutex.h> 66 #include <linux/sched.h> 67 68 #include "dvb_demux.h" 69 #include "dvb_net.h" 70 71 static int dvb_net_debug; 72 module_param(dvb_net_debug, int, 0444); 73 MODULE_PARM_DESC(dvb_net_debug, "enable debug messages"); 74 75 #define dprintk(x...) do { if (dvb_net_debug) printk(x); } while (0) 76 77 78 static inline __u32 iov_crc32( __u32 c, struct kvec *iov, unsigned int cnt ) 79 { 80 unsigned int j; 81 for (j = 0; j < cnt; j++) 82 c = crc32_be( c, iov[j].iov_base, iov[j].iov_len ); 83 return c; 84 } 85 86 87 #define DVB_NET_MULTICAST_MAX 10 88 89 #undef ULE_DEBUG 90 91 #ifdef ULE_DEBUG 92 93 #define MAC_ADDR_PRINTFMT "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x" 94 #define MAX_ADDR_PRINTFMT_ARGS(macap) (macap)[0],(macap)[1],(macap)[2],(macap)[3],(macap)[4],(macap)[5] 95 96 #define isprint(c) ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9')) 97 98 static void hexdump( const unsigned char *buf, unsigned short len ) 99 { 100 char str[80], octet[10]; 101 int ofs, i, l; 102 103 for (ofs = 0; ofs < len; ofs += 16) { 104 sprintf( str, "%03d: ", ofs ); 105 106 for (i = 0; i < 16; i++) { 107 if ((i + ofs) < len) 108 sprintf( octet, "%02x ", buf[ofs + i] ); 109 else 110 strcpy( octet, " " ); 111 112 strcat( str, octet ); 113 } 114 strcat( str, " " ); 115 l = strlen( str ); 116 117 for (i = 0; (i < 16) && ((i + ofs) < len); i++) 118 str[l++] = isprint( buf[ofs + i] ) ? buf[ofs + i] : '.'; 119 120 str[l] = '\0'; 121 printk( KERN_WARNING "%s\n", str ); 122 } 123 } 124 125 #endif 126 127 struct dvb_net_priv { 128 int in_use; 129 u16 pid; 130 struct net_device *net; 131 struct dvb_net *host; 132 struct dmx_demux *demux; 133 struct dmx_section_feed *secfeed; 134 struct dmx_section_filter *secfilter; 135 struct dmx_ts_feed *tsfeed; 136 int multi_num; 137 struct dmx_section_filter *multi_secfilter[DVB_NET_MULTICAST_MAX]; 138 unsigned char multi_macs[DVB_NET_MULTICAST_MAX][6]; 139 int rx_mode; 140 #define RX_MODE_UNI 0 141 #define RX_MODE_MULTI 1 142 #define RX_MODE_ALL_MULTI 2 143 #define RX_MODE_PROMISC 3 144 struct work_struct set_multicast_list_wq; 145 struct work_struct restart_net_feed_wq; 146 unsigned char feedtype; /* Either FEED_TYPE_ or FEED_TYPE_ULE */ 147 int need_pusi; /* Set to 1, if synchronization on PUSI required. */ 148 unsigned char tscc; /* TS continuity counter after sync on PUSI. */ 149 struct sk_buff *ule_skb; /* ULE SNDU decodes into this buffer. */ 150 unsigned char *ule_next_hdr; /* Pointer into skb to next ULE extension header. */ 151 unsigned short ule_sndu_len; /* ULE SNDU length in bytes, w/o D-Bit. */ 152 unsigned short ule_sndu_type; /* ULE SNDU type field, complete. */ 153 unsigned char ule_sndu_type_1; /* ULE SNDU type field, if split across 2 TS cells. */ 154 unsigned char ule_dbit; /* Whether the DestMAC address present 155 * or not (bit is set). */ 156 unsigned char ule_bridged; /* Whether the ULE_BRIDGED extension header was found. */ 157 int ule_sndu_remain; /* Nr. of bytes still required for current ULE SNDU. */ 158 unsigned long ts_count; /* Current ts cell counter. */ 159 struct mutex mutex; 160 }; 161 162 163 /** 164 * Determine the packet's protocol ID. The rule here is that we 165 * assume 802.3 if the type field is short enough to be a length. 166 * This is normal practice and works for any 'now in use' protocol. 167 * 168 * stolen from eth.c out of the linux kernel, hacked for dvb-device 169 * by Michael Holzt <kju@debian.org> 170 */ 171 static __be16 dvb_net_eth_type_trans(struct sk_buff *skb, 172 struct net_device *dev) 173 { 174 struct ethhdr *eth; 175 unsigned char *rawp; 176 177 skb_reset_mac_header(skb); 178 skb_pull(skb,dev->hard_header_len); 179 eth = eth_hdr(skb); 180 181 if (*eth->h_dest & 1) { 182 if(memcmp(eth->h_dest,dev->broadcast, ETH_ALEN)==0) 183 skb->pkt_type=PACKET_BROADCAST; 184 else 185 skb->pkt_type=PACKET_MULTICAST; 186 } 187 188 if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN) 189 return eth->h_proto; 190 191 rawp = skb->data; 192 193 /** 194 * This is a magic hack to spot IPX packets. Older Novell breaks 195 * the protocol design and runs IPX over 802.3 without an 802.2 LLC 196 * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This 197 * won't work for fault tolerant netware but does for the rest. 198 */ 199 if (*(unsigned short *)rawp == 0xFFFF) 200 return htons(ETH_P_802_3); 201 202 /** 203 * Real 802.2 LLC 204 */ 205 return htons(ETH_P_802_2); 206 } 207 208 #define TS_SZ 188 209 #define TS_SYNC 0x47 210 #define TS_TEI 0x80 211 #define TS_SC 0xC0 212 #define TS_PUSI 0x40 213 #define TS_AF_A 0x20 214 #define TS_AF_D 0x10 215 216 /* ULE Extension Header handlers. */ 217 218 #define ULE_TEST 0 219 #define ULE_BRIDGED 1 220 221 #define ULE_OPTEXTHDR_PADDING 0 222 223 static int ule_test_sndu( struct dvb_net_priv *p ) 224 { 225 return -1; 226 } 227 228 static int ule_bridged_sndu( struct dvb_net_priv *p ) 229 { 230 struct ethhdr *hdr = (struct ethhdr*) p->ule_next_hdr; 231 if(ntohs(hdr->h_proto) < ETH_P_802_3_MIN) { 232 int framelen = p->ule_sndu_len - ((p->ule_next_hdr+sizeof(struct ethhdr)) - p->ule_skb->data); 233 /* A frame Type < ETH_P_802_3_MIN for a bridged frame, introduces a LLC Length field. */ 234 if(framelen != ntohs(hdr->h_proto)) { 235 return -1; 236 } 237 } 238 /* Note: 239 * From RFC4326: 240 * "A bridged SNDU is a Mandatory Extension Header of Type 1. 241 * It must be the final (or only) extension header specified in the header chain of a SNDU." 242 * The 'ule_bridged' flag will cause the extension header processing loop to terminate. 243 */ 244 p->ule_bridged = 1; 245 return 0; 246 } 247 248 static int ule_exthdr_padding(struct dvb_net_priv *p) 249 { 250 return 0; 251 } 252 253 /** Handle ULE extension headers. 254 * Function is called after a successful CRC32 verification of an ULE SNDU to complete its decoding. 255 * Returns: >= 0: nr. of bytes consumed by next extension header 256 * -1: Mandatory extension header that is not recognized or TEST SNDU; discard. 257 */ 258 static int handle_one_ule_extension( struct dvb_net_priv *p ) 259 { 260 /* Table of mandatory extension header handlers. The header type is the index. */ 261 static int (*ule_mandatory_ext_handlers[255])( struct dvb_net_priv *p ) = 262 { [0] = ule_test_sndu, [1] = ule_bridged_sndu, [2] = NULL, }; 263 264 /* Table of optional extension header handlers. The header type is the index. */ 265 static int (*ule_optional_ext_handlers[255])( struct dvb_net_priv *p ) = 266 { [0] = ule_exthdr_padding, [1] = NULL, }; 267 268 int ext_len = 0; 269 unsigned char hlen = (p->ule_sndu_type & 0x0700) >> 8; 270 unsigned char htype = p->ule_sndu_type & 0x00FF; 271 272 /* Discriminate mandatory and optional extension headers. */ 273 if (hlen == 0) { 274 /* Mandatory extension header */ 275 if (ule_mandatory_ext_handlers[htype]) { 276 ext_len = ule_mandatory_ext_handlers[htype]( p ); 277 if(ext_len >= 0) { 278 p->ule_next_hdr += ext_len; 279 if (!p->ule_bridged) { 280 p->ule_sndu_type = ntohs(*(__be16 *)p->ule_next_hdr); 281 p->ule_next_hdr += 2; 282 } else { 283 p->ule_sndu_type = ntohs(*(__be16 *)(p->ule_next_hdr + ((p->ule_dbit ? 2 : 3) * ETH_ALEN))); 284 /* This assures the extension handling loop will terminate. */ 285 } 286 } 287 // else: extension handler failed or SNDU should be discarded 288 } else 289 ext_len = -1; /* SNDU has to be discarded. */ 290 } else { 291 /* Optional extension header. Calculate the length. */ 292 ext_len = hlen << 1; 293 /* Process the optional extension header according to its type. */ 294 if (ule_optional_ext_handlers[htype]) 295 (void)ule_optional_ext_handlers[htype]( p ); 296 p->ule_next_hdr += ext_len; 297 p->ule_sndu_type = ntohs( *(__be16 *)(p->ule_next_hdr-2) ); 298 /* 299 * note: the length of the next header type is included in the 300 * length of THIS optional extension header 301 */ 302 } 303 304 return ext_len; 305 } 306 307 static int handle_ule_extensions( struct dvb_net_priv *p ) 308 { 309 int total_ext_len = 0, l; 310 311 p->ule_next_hdr = p->ule_skb->data; 312 do { 313 l = handle_one_ule_extension( p ); 314 if (l < 0) 315 return l; /* Stop extension header processing and discard SNDU. */ 316 total_ext_len += l; 317 #ifdef ULE_DEBUG 318 dprintk("handle_ule_extensions: ule_next_hdr=%p, ule_sndu_type=%i, " 319 "l=%i, total_ext_len=%i\n", p->ule_next_hdr, 320 (int) p->ule_sndu_type, l, total_ext_len); 321 #endif 322 323 } while (p->ule_sndu_type < ETH_P_802_3_MIN); 324 325 return total_ext_len; 326 } 327 328 329 /** Prepare for a new ULE SNDU: reset the decoder state. */ 330 static inline void reset_ule( struct dvb_net_priv *p ) 331 { 332 p->ule_skb = NULL; 333 p->ule_next_hdr = NULL; 334 p->ule_sndu_len = 0; 335 p->ule_sndu_type = 0; 336 p->ule_sndu_type_1 = 0; 337 p->ule_sndu_remain = 0; 338 p->ule_dbit = 0xFF; 339 p->ule_bridged = 0; 340 } 341 342 /** 343 * Decode ULE SNDUs according to draft-ietf-ipdvb-ule-03.txt from a sequence of 344 * TS cells of a single PID. 345 */ 346 static void dvb_net_ule( struct net_device *dev, const u8 *buf, size_t buf_len ) 347 { 348 struct dvb_net_priv *priv = netdev_priv(dev); 349 unsigned long skipped = 0L; 350 const u8 *ts, *ts_end, *from_where = NULL; 351 u8 ts_remain = 0, how_much = 0, new_ts = 1; 352 struct ethhdr *ethh = NULL; 353 bool error = false; 354 355 #ifdef ULE_DEBUG 356 /* The code inside ULE_DEBUG keeps a history of the last 100 TS cells processed. */ 357 static unsigned char ule_hist[100*TS_SZ]; 358 static unsigned char *ule_where = ule_hist, ule_dump; 359 #endif 360 361 /* For all TS cells in current buffer. 362 * Appearently, we are called for every single TS cell. 363 */ 364 for (ts = buf, ts_end = buf + buf_len; ts < ts_end; /* no default incr. */ ) { 365 366 if (new_ts) { 367 /* We are about to process a new TS cell. */ 368 369 #ifdef ULE_DEBUG 370 if (ule_where >= &ule_hist[100*TS_SZ]) ule_where = ule_hist; 371 memcpy( ule_where, ts, TS_SZ ); 372 if (ule_dump) { 373 hexdump( ule_where, TS_SZ ); 374 ule_dump = 0; 375 } 376 ule_where += TS_SZ; 377 #endif 378 379 /* Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control . */ 380 if ((ts[0] != TS_SYNC) || (ts[1] & TS_TEI) || ((ts[3] & TS_SC) != 0)) { 381 printk(KERN_WARNING "%lu: Invalid TS cell: SYNC %#x, TEI %u, SC %#x.\n", 382 priv->ts_count, ts[0], ts[1] & TS_TEI >> 7, ts[3] & 0xC0 >> 6); 383 384 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 385 if (priv->ule_skb) { 386 dev_kfree_skb( priv->ule_skb ); 387 /* Prepare for next SNDU. */ 388 dev->stats.rx_errors++; 389 dev->stats.rx_frame_errors++; 390 } 391 reset_ule(priv); 392 priv->need_pusi = 1; 393 394 /* Continue with next TS cell. */ 395 ts += TS_SZ; 396 priv->ts_count++; 397 continue; 398 } 399 400 ts_remain = 184; 401 from_where = ts + 4; 402 } 403 /* Synchronize on PUSI, if required. */ 404 if (priv->need_pusi) { 405 if (ts[1] & TS_PUSI) { 406 /* Find beginning of first ULE SNDU in current TS cell. */ 407 /* Synchronize continuity counter. */ 408 priv->tscc = ts[3] & 0x0F; 409 /* There is a pointer field here. */ 410 if (ts[4] > ts_remain) { 411 printk(KERN_ERR "%lu: Invalid ULE packet " 412 "(pointer field %d)\n", priv->ts_count, ts[4]); 413 ts += TS_SZ; 414 priv->ts_count++; 415 continue; 416 } 417 /* Skip to destination of pointer field. */ 418 from_where = &ts[5] + ts[4]; 419 ts_remain -= 1 + ts[4]; 420 skipped = 0; 421 } else { 422 skipped++; 423 ts += TS_SZ; 424 priv->ts_count++; 425 continue; 426 } 427 } 428 429 if (new_ts) { 430 /* Check continuity counter. */ 431 if ((ts[3] & 0x0F) == priv->tscc) 432 priv->tscc = (priv->tscc + 1) & 0x0F; 433 else { 434 /* TS discontinuity handling: */ 435 printk(KERN_WARNING "%lu: TS discontinuity: got %#x, " 436 "expected %#x.\n", priv->ts_count, ts[3] & 0x0F, priv->tscc); 437 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 438 if (priv->ule_skb) { 439 dev_kfree_skb( priv->ule_skb ); 440 /* Prepare for next SNDU. */ 441 // reset_ule(priv); moved to below. 442 dev->stats.rx_errors++; 443 dev->stats.rx_frame_errors++; 444 } 445 reset_ule(priv); 446 /* skip to next PUSI. */ 447 priv->need_pusi = 1; 448 continue; 449 } 450 /* If we still have an incomplete payload, but PUSI is 451 * set; some TS cells are missing. 452 * This is only possible here, if we missed exactly 16 TS 453 * cells (continuity counter wrap). */ 454 if (ts[1] & TS_PUSI) { 455 if (! priv->need_pusi) { 456 if (!(*from_where < (ts_remain-1)) || *from_where != priv->ule_sndu_remain) { 457 /* Pointer field is invalid. Drop this TS cell and any started ULE SNDU. */ 458 printk(KERN_WARNING "%lu: Invalid pointer " 459 "field: %u.\n", priv->ts_count, *from_where); 460 461 /* Drop partly decoded SNDU, reset state, resync on PUSI. */ 462 if (priv->ule_skb) { 463 error = true; 464 dev_kfree_skb(priv->ule_skb); 465 } 466 467 if (error || priv->ule_sndu_remain) { 468 dev->stats.rx_errors++; 469 dev->stats.rx_frame_errors++; 470 error = false; 471 } 472 473 reset_ule(priv); 474 priv->need_pusi = 1; 475 continue; 476 } 477 /* Skip pointer field (we're processing a 478 * packed payload). */ 479 from_where += 1; 480 ts_remain -= 1; 481 } else 482 priv->need_pusi = 0; 483 484 if (priv->ule_sndu_remain > 183) { 485 /* Current SNDU lacks more data than there could be available in the 486 * current TS cell. */ 487 dev->stats.rx_errors++; 488 dev->stats.rx_length_errors++; 489 printk(KERN_WARNING "%lu: Expected %d more SNDU bytes, but " 490 "got PUSI (pf %d, ts_remain %d). Flushing incomplete payload.\n", 491 priv->ts_count, priv->ule_sndu_remain, ts[4], ts_remain); 492 dev_kfree_skb(priv->ule_skb); 493 /* Prepare for next SNDU. */ 494 reset_ule(priv); 495 /* Resync: go to where pointer field points to: start of next ULE SNDU. */ 496 from_where += ts[4]; 497 ts_remain -= ts[4]; 498 } 499 } 500 } 501 502 /* Check if new payload needs to be started. */ 503 if (priv->ule_skb == NULL) { 504 /* Start a new payload with skb. 505 * Find ULE header. It is only guaranteed that the 506 * length field (2 bytes) is contained in the current 507 * TS. 508 * Check ts_remain has to be >= 2 here. */ 509 if (ts_remain < 2) { 510 printk(KERN_WARNING "Invalid payload packing: only %d " 511 "bytes left in TS. Resyncing.\n", ts_remain); 512 priv->ule_sndu_len = 0; 513 priv->need_pusi = 1; 514 ts += TS_SZ; 515 continue; 516 } 517 518 if (! priv->ule_sndu_len) { 519 /* Got at least two bytes, thus extrace the SNDU length. */ 520 priv->ule_sndu_len = from_where[0] << 8 | from_where[1]; 521 if (priv->ule_sndu_len & 0x8000) { 522 /* D-Bit is set: no dest mac present. */ 523 priv->ule_sndu_len &= 0x7FFF; 524 priv->ule_dbit = 1; 525 } else 526 priv->ule_dbit = 0; 527 528 if (priv->ule_sndu_len < 5) { 529 printk(KERN_WARNING "%lu: Invalid ULE SNDU length %u. " 530 "Resyncing.\n", priv->ts_count, priv->ule_sndu_len); 531 dev->stats.rx_errors++; 532 dev->stats.rx_length_errors++; 533 priv->ule_sndu_len = 0; 534 priv->need_pusi = 1; 535 new_ts = 1; 536 ts += TS_SZ; 537 priv->ts_count++; 538 continue; 539 } 540 ts_remain -= 2; /* consume the 2 bytes SNDU length. */ 541 from_where += 2; 542 } 543 544 priv->ule_sndu_remain = priv->ule_sndu_len + 2; 545 /* 546 * State of current TS: 547 * ts_remain (remaining bytes in the current TS cell) 548 * 0 ule_type is not available now, we need the next TS cell 549 * 1 the first byte of the ule_type is present 550 * >=2 full ULE header present, maybe some payload data as well. 551 */ 552 switch (ts_remain) { 553 case 1: 554 priv->ule_sndu_remain--; 555 priv->ule_sndu_type = from_where[0] << 8; 556 priv->ule_sndu_type_1 = 1; /* first byte of ule_type is set. */ 557 ts_remain -= 1; from_where += 1; 558 /* Continue w/ next TS. */ 559 case 0: 560 new_ts = 1; 561 ts += TS_SZ; 562 priv->ts_count++; 563 continue; 564 565 default: /* complete ULE header is present in current TS. */ 566 /* Extract ULE type field. */ 567 if (priv->ule_sndu_type_1) { 568 priv->ule_sndu_type_1 = 0; 569 priv->ule_sndu_type |= from_where[0]; 570 from_where += 1; /* points to payload start. */ 571 ts_remain -= 1; 572 } else { 573 /* Complete type is present in new TS. */ 574 priv->ule_sndu_type = from_where[0] << 8 | from_where[1]; 575 from_where += 2; /* points to payload start. */ 576 ts_remain -= 2; 577 } 578 break; 579 } 580 581 /* Allocate the skb (decoder target buffer) with the correct size, as follows: 582 * prepare for the largest case: bridged SNDU with MAC address (dbit = 0). */ 583 priv->ule_skb = dev_alloc_skb( priv->ule_sndu_len + ETH_HLEN + ETH_ALEN ); 584 if (priv->ule_skb == NULL) { 585 printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", 586 dev->name); 587 dev->stats.rx_dropped++; 588 return; 589 } 590 591 /* This includes the CRC32 _and_ dest mac, if !dbit. */ 592 priv->ule_sndu_remain = priv->ule_sndu_len; 593 priv->ule_skb->dev = dev; 594 /* Leave space for Ethernet or bridged SNDU header (eth hdr plus one MAC addr). */ 595 skb_reserve( priv->ule_skb, ETH_HLEN + ETH_ALEN ); 596 } 597 598 /* Copy data into our current skb. */ 599 how_much = min(priv->ule_sndu_remain, (int)ts_remain); 600 memcpy(skb_put(priv->ule_skb, how_much), from_where, how_much); 601 priv->ule_sndu_remain -= how_much; 602 ts_remain -= how_much; 603 from_where += how_much; 604 605 /* Check for complete payload. */ 606 if (priv->ule_sndu_remain <= 0) { 607 /* Check CRC32, we've got it in our skb already. */ 608 __be16 ulen = htons(priv->ule_sndu_len); 609 __be16 utype = htons(priv->ule_sndu_type); 610 const u8 *tail; 611 struct kvec iov[3] = { 612 { &ulen, sizeof ulen }, 613 { &utype, sizeof utype }, 614 { priv->ule_skb->data, priv->ule_skb->len - 4 } 615 }; 616 u32 ule_crc = ~0L, expected_crc; 617 if (priv->ule_dbit) { 618 /* Set D-bit for CRC32 verification, 619 * if it was set originally. */ 620 ulen |= htons(0x8000); 621 } 622 623 ule_crc = iov_crc32(ule_crc, iov, 3); 624 tail = skb_tail_pointer(priv->ule_skb); 625 expected_crc = *(tail - 4) << 24 | 626 *(tail - 3) << 16 | 627 *(tail - 2) << 8 | 628 *(tail - 1); 629 if (ule_crc != expected_crc) { 630 printk(KERN_WARNING "%lu: CRC32 check FAILED: %08x / %08x, SNDU len %d type %#x, ts_remain %d, next 2: %x.\n", 631 priv->ts_count, ule_crc, expected_crc, priv->ule_sndu_len, priv->ule_sndu_type, ts_remain, ts_remain > 2 ? *(unsigned short *)from_where : 0); 632 633 #ifdef ULE_DEBUG 634 hexdump( iov[0].iov_base, iov[0].iov_len ); 635 hexdump( iov[1].iov_base, iov[1].iov_len ); 636 hexdump( iov[2].iov_base, iov[2].iov_len ); 637 638 if (ule_where == ule_hist) { 639 hexdump( &ule_hist[98*TS_SZ], TS_SZ ); 640 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 641 } else if (ule_where == &ule_hist[TS_SZ]) { 642 hexdump( &ule_hist[99*TS_SZ], TS_SZ ); 643 hexdump( ule_hist, TS_SZ ); 644 } else { 645 hexdump( ule_where - TS_SZ - TS_SZ, TS_SZ ); 646 hexdump( ule_where - TS_SZ, TS_SZ ); 647 } 648 ule_dump = 1; 649 #endif 650 651 dev->stats.rx_errors++; 652 dev->stats.rx_crc_errors++; 653 dev_kfree_skb(priv->ule_skb); 654 } else { 655 /* CRC32 verified OK. */ 656 u8 dest_addr[ETH_ALEN]; 657 static const u8 bc_addr[ETH_ALEN] = 658 { [ 0 ... ETH_ALEN-1] = 0xff }; 659 660 /* CRC32 was OK. Remove it from skb. */ 661 priv->ule_skb->tail -= 4; 662 priv->ule_skb->len -= 4; 663 664 if (!priv->ule_dbit) { 665 /* 666 * The destination MAC address is the 667 * next data in the skb. It comes 668 * before any extension headers. 669 * 670 * Check if the payload of this SNDU 671 * should be passed up the stack. 672 */ 673 register int drop = 0; 674 if (priv->rx_mode != RX_MODE_PROMISC) { 675 if (priv->ule_skb->data[0] & 0x01) { 676 /* multicast or broadcast */ 677 if (memcmp(priv->ule_skb->data, bc_addr, ETH_ALEN)) { 678 /* multicast */ 679 if (priv->rx_mode == RX_MODE_MULTI) { 680 int i; 681 for(i = 0; i < priv->multi_num && memcmp(priv->ule_skb->data, priv->multi_macs[i], ETH_ALEN); i++) 682 ; 683 if (i == priv->multi_num) 684 drop = 1; 685 } else if (priv->rx_mode != RX_MODE_ALL_MULTI) 686 drop = 1; /* no broadcast; */ 687 /* else: all multicast mode: accept all multicast packets */ 688 } 689 /* else: broadcast */ 690 } 691 else if (memcmp(priv->ule_skb->data, dev->dev_addr, ETH_ALEN)) 692 drop = 1; 693 /* else: destination address matches the MAC address of our receiver device */ 694 } 695 /* else: promiscuous mode; pass everything up the stack */ 696 697 if (drop) { 698 #ifdef ULE_DEBUG 699 dprintk("Dropping SNDU: MAC destination address does not match: dest addr: "MAC_ADDR_PRINTFMT", dev addr: "MAC_ADDR_PRINTFMT"\n", 700 MAX_ADDR_PRINTFMT_ARGS(priv->ule_skb->data), MAX_ADDR_PRINTFMT_ARGS(dev->dev_addr)); 701 #endif 702 dev_kfree_skb(priv->ule_skb); 703 goto sndu_done; 704 } 705 else 706 { 707 skb_copy_from_linear_data(priv->ule_skb, 708 dest_addr, 709 ETH_ALEN); 710 skb_pull(priv->ule_skb, ETH_ALEN); 711 } 712 } 713 714 /* Handle ULE Extension Headers. */ 715 if (priv->ule_sndu_type < ETH_P_802_3_MIN) { 716 /* There is an extension header. Handle it accordingly. */ 717 int l = handle_ule_extensions(priv); 718 if (l < 0) { 719 /* Mandatory extension header unknown or TEST SNDU. Drop it. */ 720 // printk( KERN_WARNING "Dropping SNDU, extension headers.\n" ); 721 dev_kfree_skb(priv->ule_skb); 722 goto sndu_done; 723 } 724 skb_pull(priv->ule_skb, l); 725 } 726 727 /* 728 * Construct/assure correct ethernet header. 729 * Note: in bridged mode (priv->ule_bridged != 730 * 0) we already have the (original) ethernet 731 * header at the start of the payload (after 732 * optional dest. address and any extension 733 * headers). 734 */ 735 736 if (!priv->ule_bridged) { 737 skb_push(priv->ule_skb, ETH_HLEN); 738 ethh = (struct ethhdr *)priv->ule_skb->data; 739 if (!priv->ule_dbit) { 740 /* dest_addr buffer is only valid if priv->ule_dbit == 0 */ 741 memcpy(ethh->h_dest, dest_addr, ETH_ALEN); 742 memset(ethh->h_source, 0, ETH_ALEN); 743 } 744 else /* zeroize source and dest */ 745 memset( ethh, 0, ETH_ALEN*2 ); 746 747 ethh->h_proto = htons(priv->ule_sndu_type); 748 } 749 /* else: skb is in correct state; nothing to do. */ 750 priv->ule_bridged = 0; 751 752 /* Stuff into kernel's protocol stack. */ 753 priv->ule_skb->protocol = dvb_net_eth_type_trans(priv->ule_skb, dev); 754 /* If D-bit is set (i.e. destination MAC address not present), 755 * receive the packet anyhow. */ 756 /* if (priv->ule_dbit && skb->pkt_type == PACKET_OTHERHOST) 757 priv->ule_skb->pkt_type = PACKET_HOST; */ 758 dev->stats.rx_packets++; 759 dev->stats.rx_bytes += priv->ule_skb->len; 760 netif_rx(priv->ule_skb); 761 } 762 sndu_done: 763 /* Prepare for next SNDU. */ 764 reset_ule(priv); 765 } 766 767 /* More data in current TS (look at the bytes following the CRC32)? */ 768 if (ts_remain >= 2 && *((unsigned short *)from_where) != 0xFFFF) { 769 /* Next ULE SNDU starts right there. */ 770 new_ts = 0; 771 priv->ule_skb = NULL; 772 priv->ule_sndu_type_1 = 0; 773 priv->ule_sndu_len = 0; 774 // printk(KERN_WARNING "More data in current TS: [%#x %#x %#x %#x]\n", 775 // *(from_where + 0), *(from_where + 1), 776 // *(from_where + 2), *(from_where + 3)); 777 // printk(KERN_WARNING "ts @ %p, stopped @ %p:\n", ts, from_where + 0); 778 // hexdump(ts, 188); 779 } else { 780 new_ts = 1; 781 ts += TS_SZ; 782 priv->ts_count++; 783 if (priv->ule_skb == NULL) { 784 priv->need_pusi = 1; 785 priv->ule_sndu_type_1 = 0; 786 priv->ule_sndu_len = 0; 787 } 788 } 789 } /* for all available TS cells */ 790 } 791 792 static int dvb_net_ts_callback(const u8 *buffer1, size_t buffer1_len, 793 const u8 *buffer2, size_t buffer2_len, 794 struct dmx_ts_feed *feed, enum dmx_success success) 795 { 796 struct net_device *dev = feed->priv; 797 798 if (buffer2) 799 printk(KERN_WARNING "buffer2 not NULL: %p.\n", buffer2); 800 if (buffer1_len > 32768) 801 printk(KERN_WARNING "length > 32k: %zu.\n", buffer1_len); 802 /* printk("TS callback: %u bytes, %u TS cells @ %p.\n", 803 buffer1_len, buffer1_len / TS_SZ, buffer1); */ 804 dvb_net_ule(dev, buffer1, buffer1_len); 805 return 0; 806 } 807 808 809 static void dvb_net_sec(struct net_device *dev, 810 const u8 *pkt, int pkt_len) 811 { 812 u8 *eth; 813 struct sk_buff *skb; 814 struct net_device_stats *stats = &dev->stats; 815 int snap = 0; 816 817 /* note: pkt_len includes a 32bit checksum */ 818 if (pkt_len < 16) { 819 printk("%s: IP/MPE packet length = %d too small.\n", 820 dev->name, pkt_len); 821 stats->rx_errors++; 822 stats->rx_length_errors++; 823 return; 824 } 825 /* it seems some ISPs manage to screw up here, so we have to 826 * relax the error checks... */ 827 #if 0 828 if ((pkt[5] & 0xfd) != 0xc1) { 829 /* drop scrambled or broken packets */ 830 #else 831 if ((pkt[5] & 0x3c) != 0x00) { 832 /* drop scrambled */ 833 #endif 834 stats->rx_errors++; 835 stats->rx_crc_errors++; 836 return; 837 } 838 if (pkt[5] & 0x02) { 839 /* handle LLC/SNAP, see rfc-1042 */ 840 if (pkt_len < 24 || memcmp(&pkt[12], "\xaa\xaa\x03\0\0\0", 6)) { 841 stats->rx_dropped++; 842 return; 843 } 844 snap = 8; 845 } 846 if (pkt[7]) { 847 /* FIXME: assemble datagram from multiple sections */ 848 stats->rx_errors++; 849 stats->rx_frame_errors++; 850 return; 851 } 852 853 /* we have 14 byte ethernet header (ip header follows); 854 * 12 byte MPE header; 4 byte checksum; + 2 byte alignment, 8 byte LLC/SNAP 855 */ 856 if (!(skb = dev_alloc_skb(pkt_len - 4 - 12 + 14 + 2 - snap))) { 857 //printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); 858 stats->rx_dropped++; 859 return; 860 } 861 skb_reserve(skb, 2); /* longword align L3 header */ 862 skb->dev = dev; 863 864 /* copy L3 payload */ 865 eth = (u8 *) skb_put(skb, pkt_len - 12 - 4 + 14 - snap); 866 memcpy(eth + 14, pkt + 12 + snap, pkt_len - 12 - 4 - snap); 867 868 /* create ethernet header: */ 869 eth[0]=pkt[0x0b]; 870 eth[1]=pkt[0x0a]; 871 eth[2]=pkt[0x09]; 872 eth[3]=pkt[0x08]; 873 eth[4]=pkt[0x04]; 874 eth[5]=pkt[0x03]; 875 876 eth[6]=eth[7]=eth[8]=eth[9]=eth[10]=eth[11]=0; 877 878 if (snap) { 879 eth[12] = pkt[18]; 880 eth[13] = pkt[19]; 881 } else { 882 /* protocol numbers are from rfc-1700 or 883 * http://www.iana.org/assignments/ethernet-numbers 884 */ 885 if (pkt[12] >> 4 == 6) { /* version field from IP header */ 886 eth[12] = 0x86; /* IPv6 */ 887 eth[13] = 0xdd; 888 } else { 889 eth[12] = 0x08; /* IPv4 */ 890 eth[13] = 0x00; 891 } 892 } 893 894 skb->protocol = dvb_net_eth_type_trans(skb, dev); 895 896 stats->rx_packets++; 897 stats->rx_bytes+=skb->len; 898 netif_rx(skb); 899 } 900 901 static int dvb_net_sec_callback(const u8 *buffer1, size_t buffer1_len, 902 const u8 *buffer2, size_t buffer2_len, 903 struct dmx_section_filter *filter, 904 enum dmx_success success) 905 { 906 struct net_device *dev = filter->priv; 907 908 /** 909 * we rely on the DVB API definition where exactly one complete 910 * section is delivered in buffer1 911 */ 912 dvb_net_sec (dev, buffer1, buffer1_len); 913 return 0; 914 } 915 916 static int dvb_net_tx(struct sk_buff *skb, struct net_device *dev) 917 { 918 dev_kfree_skb(skb); 919 return NETDEV_TX_OK; 920 } 921 922 static u8 mask_normal[6]={0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 923 static u8 mask_allmulti[6]={0xff, 0xff, 0xff, 0x00, 0x00, 0x00}; 924 static u8 mac_allmulti[6]={0x01, 0x00, 0x5e, 0x00, 0x00, 0x00}; 925 static u8 mask_promisc[6]={0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 926 927 static int dvb_net_filter_sec_set(struct net_device *dev, 928 struct dmx_section_filter **secfilter, 929 u8 *mac, u8 *mac_mask) 930 { 931 struct dvb_net_priv *priv = netdev_priv(dev); 932 int ret; 933 934 *secfilter=NULL; 935 ret = priv->secfeed->allocate_filter(priv->secfeed, secfilter); 936 if (ret<0) { 937 printk("%s: could not get filter\n", dev->name); 938 return ret; 939 } 940 941 (*secfilter)->priv=(void *) dev; 942 943 memset((*secfilter)->filter_value, 0x00, DMX_MAX_FILTER_SIZE); 944 memset((*secfilter)->filter_mask, 0x00, DMX_MAX_FILTER_SIZE); 945 memset((*secfilter)->filter_mode, 0xff, DMX_MAX_FILTER_SIZE); 946 947 (*secfilter)->filter_value[0]=0x3e; 948 (*secfilter)->filter_value[3]=mac[5]; 949 (*secfilter)->filter_value[4]=mac[4]; 950 (*secfilter)->filter_value[8]=mac[3]; 951 (*secfilter)->filter_value[9]=mac[2]; 952 (*secfilter)->filter_value[10]=mac[1]; 953 (*secfilter)->filter_value[11]=mac[0]; 954 955 (*secfilter)->filter_mask[0] = 0xff; 956 (*secfilter)->filter_mask[3] = mac_mask[5]; 957 (*secfilter)->filter_mask[4] = mac_mask[4]; 958 (*secfilter)->filter_mask[8] = mac_mask[3]; 959 (*secfilter)->filter_mask[9] = mac_mask[2]; 960 (*secfilter)->filter_mask[10] = mac_mask[1]; 961 (*secfilter)->filter_mask[11]=mac_mask[0]; 962 963 dprintk("%s: filter mac=%pM\n", dev->name, mac); 964 dprintk("%s: filter mask=%pM\n", dev->name, mac_mask); 965 966 return 0; 967 } 968 969 static int dvb_net_feed_start(struct net_device *dev) 970 { 971 int ret = 0, i; 972 struct dvb_net_priv *priv = netdev_priv(dev); 973 struct dmx_demux *demux = priv->demux; 974 unsigned char *mac = (unsigned char *) dev->dev_addr; 975 976 dprintk("%s: rx_mode %i\n", __func__, priv->rx_mode); 977 mutex_lock(&priv->mutex); 978 if (priv->tsfeed || priv->secfeed || priv->secfilter || priv->multi_secfilter[0]) 979 printk("%s: BUG %d\n", __func__, __LINE__); 980 981 priv->secfeed=NULL; 982 priv->secfilter=NULL; 983 priv->tsfeed = NULL; 984 985 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 986 dprintk("%s: alloc secfeed\n", __func__); 987 ret=demux->allocate_section_feed(demux, &priv->secfeed, 988 dvb_net_sec_callback); 989 if (ret<0) { 990 printk("%s: could not allocate section feed\n", dev->name); 991 goto error; 992 } 993 994 ret = priv->secfeed->set(priv->secfeed, priv->pid, 32768, 1); 995 996 if (ret<0) { 997 printk("%s: could not set section feed\n", dev->name); 998 priv->demux->release_section_feed(priv->demux, priv->secfeed); 999 priv->secfeed=NULL; 1000 goto error; 1001 } 1002 1003 if (priv->rx_mode != RX_MODE_PROMISC) { 1004 dprintk("%s: set secfilter\n", __func__); 1005 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_normal); 1006 } 1007 1008 switch (priv->rx_mode) { 1009 case RX_MODE_MULTI: 1010 for (i = 0; i < priv->multi_num; i++) { 1011 dprintk("%s: set multi_secfilter[%d]\n", __func__, i); 1012 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[i], 1013 priv->multi_macs[i], mask_normal); 1014 } 1015 break; 1016 case RX_MODE_ALL_MULTI: 1017 priv->multi_num=1; 1018 dprintk("%s: set multi_secfilter[0]\n", __func__); 1019 dvb_net_filter_sec_set(dev, &priv->multi_secfilter[0], 1020 mac_allmulti, mask_allmulti); 1021 break; 1022 case RX_MODE_PROMISC: 1023 priv->multi_num=0; 1024 dprintk("%s: set secfilter\n", __func__); 1025 dvb_net_filter_sec_set(dev, &priv->secfilter, mac, mask_promisc); 1026 break; 1027 } 1028 1029 dprintk("%s: start filtering\n", __func__); 1030 priv->secfeed->start_filtering(priv->secfeed); 1031 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1032 struct timespec timeout = { 0, 10000000 }; // 10 msec 1033 1034 /* we have payloads encapsulated in TS */ 1035 dprintk("%s: alloc tsfeed\n", __func__); 1036 ret = demux->allocate_ts_feed(demux, &priv->tsfeed, dvb_net_ts_callback); 1037 if (ret < 0) { 1038 printk("%s: could not allocate ts feed\n", dev->name); 1039 goto error; 1040 } 1041 1042 /* Set netdevice pointer for ts decaps callback. */ 1043 priv->tsfeed->priv = (void *)dev; 1044 ret = priv->tsfeed->set(priv->tsfeed, 1045 priv->pid, /* pid */ 1046 TS_PACKET, /* type */ 1047 DMX_PES_OTHER, /* pes type */ 1048 32768, /* circular buffer size */ 1049 timeout /* timeout */ 1050 ); 1051 1052 if (ret < 0) { 1053 printk("%s: could not set ts feed\n", dev->name); 1054 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1055 priv->tsfeed = NULL; 1056 goto error; 1057 } 1058 1059 dprintk("%s: start filtering\n", __func__); 1060 priv->tsfeed->start_filtering(priv->tsfeed); 1061 } else 1062 ret = -EINVAL; 1063 1064 error: 1065 mutex_unlock(&priv->mutex); 1066 return ret; 1067 } 1068 1069 static int dvb_net_feed_stop(struct net_device *dev) 1070 { 1071 struct dvb_net_priv *priv = netdev_priv(dev); 1072 int i, ret = 0; 1073 1074 dprintk("%s\n", __func__); 1075 mutex_lock(&priv->mutex); 1076 if (priv->feedtype == DVB_NET_FEEDTYPE_MPE) { 1077 if (priv->secfeed) { 1078 if (priv->secfeed->is_filtering) { 1079 dprintk("%s: stop secfeed\n", __func__); 1080 priv->secfeed->stop_filtering(priv->secfeed); 1081 } 1082 1083 if (priv->secfilter) { 1084 dprintk("%s: release secfilter\n", __func__); 1085 priv->secfeed->release_filter(priv->secfeed, 1086 priv->secfilter); 1087 priv->secfilter=NULL; 1088 } 1089 1090 for (i=0; i<priv->multi_num; i++) { 1091 if (priv->multi_secfilter[i]) { 1092 dprintk("%s: release multi_filter[%d]\n", 1093 __func__, i); 1094 priv->secfeed->release_filter(priv->secfeed, 1095 priv->multi_secfilter[i]); 1096 priv->multi_secfilter[i] = NULL; 1097 } 1098 } 1099 1100 priv->demux->release_section_feed(priv->demux, priv->secfeed); 1101 priv->secfeed = NULL; 1102 } else 1103 printk("%s: no feed to stop\n", dev->name); 1104 } else if (priv->feedtype == DVB_NET_FEEDTYPE_ULE) { 1105 if (priv->tsfeed) { 1106 if (priv->tsfeed->is_filtering) { 1107 dprintk("%s: stop tsfeed\n", __func__); 1108 priv->tsfeed->stop_filtering(priv->tsfeed); 1109 } 1110 priv->demux->release_ts_feed(priv->demux, priv->tsfeed); 1111 priv->tsfeed = NULL; 1112 } 1113 else 1114 printk("%s: no ts feed to stop\n", dev->name); 1115 } else 1116 ret = -EINVAL; 1117 mutex_unlock(&priv->mutex); 1118 return ret; 1119 } 1120 1121 1122 static int dvb_set_mc_filter(struct net_device *dev, unsigned char *addr) 1123 { 1124 struct dvb_net_priv *priv = netdev_priv(dev); 1125 1126 if (priv->multi_num == DVB_NET_MULTICAST_MAX) 1127 return -ENOMEM; 1128 1129 memcpy(priv->multi_macs[priv->multi_num], addr, ETH_ALEN); 1130 1131 priv->multi_num++; 1132 return 0; 1133 } 1134 1135 1136 static void wq_set_multicast_list (struct work_struct *work) 1137 { 1138 struct dvb_net_priv *priv = 1139 container_of(work, struct dvb_net_priv, set_multicast_list_wq); 1140 struct net_device *dev = priv->net; 1141 1142 dvb_net_feed_stop(dev); 1143 priv->rx_mode = RX_MODE_UNI; 1144 netif_addr_lock_bh(dev); 1145 1146 if (dev->flags & IFF_PROMISC) { 1147 dprintk("%s: promiscuous mode\n", dev->name); 1148 priv->rx_mode = RX_MODE_PROMISC; 1149 } else if ((dev->flags & IFF_ALLMULTI)) { 1150 dprintk("%s: allmulti mode\n", dev->name); 1151 priv->rx_mode = RX_MODE_ALL_MULTI; 1152 } else if (!netdev_mc_empty(dev)) { 1153 struct netdev_hw_addr *ha; 1154 1155 dprintk("%s: set_mc_list, %d entries\n", 1156 dev->name, netdev_mc_count(dev)); 1157 1158 priv->rx_mode = RX_MODE_MULTI; 1159 priv->multi_num = 0; 1160 1161 netdev_for_each_mc_addr(ha, dev) 1162 dvb_set_mc_filter(dev, ha->addr); 1163 } 1164 1165 netif_addr_unlock_bh(dev); 1166 dvb_net_feed_start(dev); 1167 } 1168 1169 1170 static void dvb_net_set_multicast_list (struct net_device *dev) 1171 { 1172 struct dvb_net_priv *priv = netdev_priv(dev); 1173 schedule_work(&priv->set_multicast_list_wq); 1174 } 1175 1176 1177 static void wq_restart_net_feed (struct work_struct *work) 1178 { 1179 struct dvb_net_priv *priv = 1180 container_of(work, struct dvb_net_priv, restart_net_feed_wq); 1181 struct net_device *dev = priv->net; 1182 1183 if (netif_running(dev)) { 1184 dvb_net_feed_stop(dev); 1185 dvb_net_feed_start(dev); 1186 } 1187 } 1188 1189 1190 static int dvb_net_set_mac (struct net_device *dev, void *p) 1191 { 1192 struct dvb_net_priv *priv = netdev_priv(dev); 1193 struct sockaddr *addr=p; 1194 1195 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); 1196 1197 if (netif_running(dev)) 1198 schedule_work(&priv->restart_net_feed_wq); 1199 1200 return 0; 1201 } 1202 1203 1204 static int dvb_net_open(struct net_device *dev) 1205 { 1206 struct dvb_net_priv *priv = netdev_priv(dev); 1207 1208 priv->in_use++; 1209 dvb_net_feed_start(dev); 1210 return 0; 1211 } 1212 1213 1214 static int dvb_net_stop(struct net_device *dev) 1215 { 1216 struct dvb_net_priv *priv = netdev_priv(dev); 1217 1218 priv->in_use--; 1219 return dvb_net_feed_stop(dev); 1220 } 1221 1222 static const struct header_ops dvb_header_ops = { 1223 .create = eth_header, 1224 .parse = eth_header_parse, 1225 .rebuild = eth_rebuild_header, 1226 }; 1227 1228 1229 static const struct net_device_ops dvb_netdev_ops = { 1230 .ndo_open = dvb_net_open, 1231 .ndo_stop = dvb_net_stop, 1232 .ndo_start_xmit = dvb_net_tx, 1233 .ndo_set_rx_mode = dvb_net_set_multicast_list, 1234 .ndo_set_mac_address = dvb_net_set_mac, 1235 .ndo_change_mtu = eth_change_mtu, 1236 .ndo_validate_addr = eth_validate_addr, 1237 }; 1238 1239 static void dvb_net_setup(struct net_device *dev) 1240 { 1241 ether_setup(dev); 1242 1243 dev->header_ops = &dvb_header_ops; 1244 dev->netdev_ops = &dvb_netdev_ops; 1245 dev->mtu = 4096; 1246 1247 dev->flags |= IFF_NOARP; 1248 } 1249 1250 static int get_if(struct dvb_net *dvbnet) 1251 { 1252 int i; 1253 1254 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1255 if (!dvbnet->state[i]) 1256 break; 1257 1258 if (i == DVB_NET_DEVICES_MAX) 1259 return -1; 1260 1261 dvbnet->state[i]=1; 1262 return i; 1263 } 1264 1265 static int dvb_net_add_if(struct dvb_net *dvbnet, u16 pid, u8 feedtype) 1266 { 1267 struct net_device *net; 1268 struct dvb_net_priv *priv; 1269 int result; 1270 int if_num; 1271 1272 if (feedtype != DVB_NET_FEEDTYPE_MPE && feedtype != DVB_NET_FEEDTYPE_ULE) 1273 return -EINVAL; 1274 if ((if_num = get_if(dvbnet)) < 0) 1275 return -EINVAL; 1276 1277 net = alloc_netdev(sizeof(struct dvb_net_priv), "dvb", dvb_net_setup); 1278 if (!net) 1279 return -ENOMEM; 1280 1281 if (dvbnet->dvbdev->id) 1282 snprintf(net->name, IFNAMSIZ, "dvb%d%u%d", 1283 dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num); 1284 else 1285 /* compatibility fix to keep dvb0_0 format */ 1286 snprintf(net->name, IFNAMSIZ, "dvb%d_%d", 1287 dvbnet->dvbdev->adapter->num, if_num); 1288 1289 net->addr_len = 6; 1290 memcpy(net->dev_addr, dvbnet->dvbdev->adapter->proposed_mac, 6); 1291 1292 dvbnet->device[if_num] = net; 1293 1294 priv = netdev_priv(net); 1295 priv->net = net; 1296 priv->demux = dvbnet->demux; 1297 priv->pid = pid; 1298 priv->rx_mode = RX_MODE_UNI; 1299 priv->need_pusi = 1; 1300 priv->tscc = 0; 1301 priv->feedtype = feedtype; 1302 reset_ule(priv); 1303 1304 INIT_WORK(&priv->set_multicast_list_wq, wq_set_multicast_list); 1305 INIT_WORK(&priv->restart_net_feed_wq, wq_restart_net_feed); 1306 mutex_init(&priv->mutex); 1307 1308 net->base_addr = pid; 1309 1310 if ((result = register_netdev(net)) < 0) { 1311 dvbnet->device[if_num] = NULL; 1312 free_netdev(net); 1313 return result; 1314 } 1315 printk("dvb_net: created network interface %s\n", net->name); 1316 1317 return if_num; 1318 } 1319 1320 static int dvb_net_remove_if(struct dvb_net *dvbnet, unsigned long num) 1321 { 1322 struct net_device *net = dvbnet->device[num]; 1323 struct dvb_net_priv *priv; 1324 1325 if (!dvbnet->state[num]) 1326 return -EINVAL; 1327 priv = netdev_priv(net); 1328 if (priv->in_use) 1329 return -EBUSY; 1330 1331 dvb_net_stop(net); 1332 flush_work(&priv->set_multicast_list_wq); 1333 flush_work(&priv->restart_net_feed_wq); 1334 printk("dvb_net: removed network interface %s\n", net->name); 1335 unregister_netdev(net); 1336 dvbnet->state[num]=0; 1337 dvbnet->device[num] = NULL; 1338 free_netdev(net); 1339 1340 return 0; 1341 } 1342 1343 static int dvb_net_do_ioctl(struct file *file, 1344 unsigned int cmd, void *parg) 1345 { 1346 struct dvb_device *dvbdev = file->private_data; 1347 struct dvb_net *dvbnet = dvbdev->priv; 1348 int ret = 0; 1349 1350 if (((file->f_flags&O_ACCMODE)==O_RDONLY)) 1351 return -EPERM; 1352 1353 if (mutex_lock_interruptible(&dvbnet->ioctl_mutex)) 1354 return -ERESTARTSYS; 1355 1356 switch (cmd) { 1357 case NET_ADD_IF: 1358 { 1359 struct dvb_net_if *dvbnetif = parg; 1360 int result; 1361 1362 if (!capable(CAP_SYS_ADMIN)) { 1363 ret = -EPERM; 1364 goto ioctl_error; 1365 } 1366 1367 if (!try_module_get(dvbdev->adapter->module)) { 1368 ret = -EPERM; 1369 goto ioctl_error; 1370 } 1371 1372 result=dvb_net_add_if(dvbnet, dvbnetif->pid, dvbnetif->feedtype); 1373 if (result<0) { 1374 module_put(dvbdev->adapter->module); 1375 ret = result; 1376 goto ioctl_error; 1377 } 1378 dvbnetif->if_num=result; 1379 break; 1380 } 1381 case NET_GET_IF: 1382 { 1383 struct net_device *netdev; 1384 struct dvb_net_priv *priv_data; 1385 struct dvb_net_if *dvbnetif = parg; 1386 1387 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1388 !dvbnet->state[dvbnetif->if_num]) { 1389 ret = -EINVAL; 1390 goto ioctl_error; 1391 } 1392 1393 netdev = dvbnet->device[dvbnetif->if_num]; 1394 1395 priv_data = netdev_priv(netdev); 1396 dvbnetif->pid=priv_data->pid; 1397 dvbnetif->feedtype=priv_data->feedtype; 1398 break; 1399 } 1400 case NET_REMOVE_IF: 1401 { 1402 if (!capable(CAP_SYS_ADMIN)) { 1403 ret = -EPERM; 1404 goto ioctl_error; 1405 } 1406 if ((unsigned long) parg >= DVB_NET_DEVICES_MAX) { 1407 ret = -EINVAL; 1408 goto ioctl_error; 1409 } 1410 ret = dvb_net_remove_if(dvbnet, (unsigned long) parg); 1411 if (!ret) 1412 module_put(dvbdev->adapter->module); 1413 break; 1414 } 1415 1416 /* binary compatibility cruft */ 1417 case __NET_ADD_IF_OLD: 1418 { 1419 struct __dvb_net_if_old *dvbnetif = parg; 1420 int result; 1421 1422 if (!capable(CAP_SYS_ADMIN)) { 1423 ret = -EPERM; 1424 goto ioctl_error; 1425 } 1426 1427 if (!try_module_get(dvbdev->adapter->module)) { 1428 ret = -EPERM; 1429 goto ioctl_error; 1430 } 1431 1432 result=dvb_net_add_if(dvbnet, dvbnetif->pid, DVB_NET_FEEDTYPE_MPE); 1433 if (result<0) { 1434 module_put(dvbdev->adapter->module); 1435 ret = result; 1436 goto ioctl_error; 1437 } 1438 dvbnetif->if_num=result; 1439 break; 1440 } 1441 case __NET_GET_IF_OLD: 1442 { 1443 struct net_device *netdev; 1444 struct dvb_net_priv *priv_data; 1445 struct __dvb_net_if_old *dvbnetif = parg; 1446 1447 if (dvbnetif->if_num >= DVB_NET_DEVICES_MAX || 1448 !dvbnet->state[dvbnetif->if_num]) { 1449 ret = -EINVAL; 1450 goto ioctl_error; 1451 } 1452 1453 netdev = dvbnet->device[dvbnetif->if_num]; 1454 1455 priv_data = netdev_priv(netdev); 1456 dvbnetif->pid=priv_data->pid; 1457 break; 1458 } 1459 default: 1460 ret = -ENOTTY; 1461 break; 1462 } 1463 1464 ioctl_error: 1465 mutex_unlock(&dvbnet->ioctl_mutex); 1466 return ret; 1467 } 1468 1469 static long dvb_net_ioctl(struct file *file, 1470 unsigned int cmd, unsigned long arg) 1471 { 1472 return dvb_usercopy(file, cmd, arg, dvb_net_do_ioctl); 1473 } 1474 1475 static int dvb_net_close(struct inode *inode, struct file *file) 1476 { 1477 struct dvb_device *dvbdev = file->private_data; 1478 struct dvb_net *dvbnet = dvbdev->priv; 1479 1480 dvb_generic_release(inode, file); 1481 1482 if(dvbdev->users == 1 && dvbnet->exit == 1) 1483 wake_up(&dvbdev->wait_queue); 1484 return 0; 1485 } 1486 1487 1488 static const struct file_operations dvb_net_fops = { 1489 .owner = THIS_MODULE, 1490 .unlocked_ioctl = dvb_net_ioctl, 1491 .open = dvb_generic_open, 1492 .release = dvb_net_close, 1493 .llseek = noop_llseek, 1494 }; 1495 1496 static struct dvb_device dvbdev_net = { 1497 .priv = NULL, 1498 .users = 1, 1499 .writers = 1, 1500 .fops = &dvb_net_fops, 1501 }; 1502 1503 1504 void dvb_net_release (struct dvb_net *dvbnet) 1505 { 1506 int i; 1507 1508 dvbnet->exit = 1; 1509 if (dvbnet->dvbdev->users < 1) 1510 wait_event(dvbnet->dvbdev->wait_queue, 1511 dvbnet->dvbdev->users==1); 1512 1513 dvb_unregister_device(dvbnet->dvbdev); 1514 1515 for (i=0; i<DVB_NET_DEVICES_MAX; i++) { 1516 if (!dvbnet->state[i]) 1517 continue; 1518 dvb_net_remove_if(dvbnet, i); 1519 } 1520 } 1521 EXPORT_SYMBOL(dvb_net_release); 1522 1523 1524 int dvb_net_init (struct dvb_adapter *adap, struct dvb_net *dvbnet, 1525 struct dmx_demux *dmx) 1526 { 1527 int i; 1528 1529 mutex_init(&dvbnet->ioctl_mutex); 1530 dvbnet->demux = dmx; 1531 1532 for (i=0; i<DVB_NET_DEVICES_MAX; i++) 1533 dvbnet->state[i] = 0; 1534 1535 return dvb_register_device(adap, &dvbnet->dvbdev, &dvbdev_net, 1536 dvbnet, DVB_DEVICE_NET); 1537 } 1538 EXPORT_SYMBOL(dvb_net_init); 1539